[ABSTRAK
Selain tantangan untuk mereduksi penggunaan energi tak terbarukan yangmenyebabkan pemanasan global, potensi besar Indonesia dalam menerima panas darimatahari harus dioptimumkan. Pemanfaatan energi panas dari matahari masih rendah,oleh karena itu solar kolektor bertipe tabung vakum merupakan solusi yang bijakuntuk memanfaatkan panas tersebut. Dengan menggunakan heat pipe sebagai mediapenghantar panas yang pasif, solar kolektor dapat bekerja tanpa konsumsi energitambahan. Karakterisasi dibawah sinar matahari dan dengan menggunakan lampuhalogen beserta voltage regulator dilakukan untuk mengetahui panas yang diserapoleh prototipe. Pada eksperimen ini, kotak insulasi yang dibuat dari styrofoam dankayu digunakan untuk mengetahui kerugian panas.Untuk meningkatkan jumlah panas yang diserap, plat penyerap panas yang diberilapisan coating digunakan pada heat pipe. Optimasi performa thermal dilakukandengan memvariasikan fluida kerja, wick, dan aplikasi sudut kemiringan, dimana airsuling, nanofluida Al2O3-air dengan konsentrasi volumetris sebesar 5% dan 0,3%digunakan sebagai fluida kerja, stainless steel screen mesh dengan skala mesh 200,250, dan 300 digunakan sebagai wick, dan sudut aplikasi divariasikan pada sudut 0o –60o dengan 15o perubahan sudut kemiringan.Hasil eksperimen dan analisis lanjutan menunjukan bahwa performa thermalterbaik dari prototipe solar kolektor didapatkan dengan penggunaan nanofluidaAl2O3-air dengan konsentrasi volumetris 0,3% dan wick dengan skala mesh 300 dansudut kemiringan sebesar 60o. Resistansi thermal terbaik diketahui sebesar 0,592oC/W dengan efisiensi sistem yang mencapai 76,53%.
ABSTRACT
Beside the challenges to reduce the consumption of nonrenewable energy thatcauses global warming, Indonesia great potential in receiving heat from the sun mustbe optimized. Since the utilization of thermal energy from the sun is still low, vacuumtube solar collector will be a well applicable solution to utilize the heat. Using heatpipes as passive heat transfer device, this research was conducted to optimize thethermal performance of solar collector without using extra energy. Characterizationunder the sun, and using halogen lamp with voltage regulator was done in order topredict the heat absorbed by the designed prototype. In this experiment, insulationbox, which made of Styrofoam and wood was made to calculate heat losses.To increase heat absorbed, coating fin is applied at heat pipe. Optimization ofthermal performance of solar collector was done with varied working fluid, wick ofheat pipe, and inclination angle of prototype application, where condensed water,Al2O3-water nanofluid with 5% and 0.3% volumetric concentration were used asvaried working fluid, stainless steen screen mesh with 200, 250, and 300 mesh scalewere used as wick, and inclination angle was varied from 0o – 60o with 15oinclination angle differences.Experimental result and further analysis shows that the best thermal performanceof solar collector prototype by using 0.3% volumetric ratio of Al2O3-water nanofluidas working fluid, stainless steel screen mesh with 300 mesh scale as wick inside heatpipe, and 60o inclination angle for prototype application. The thermal resistance is ashigh as 0.592 oC/W and the system efficiency is as high as 76.53%., Beside the challenges to reduce the consumption of nonrenewable energy thatcauses global warming, Indonesia great potential in receiving heat from the sun mustbe optimized. Since the utilization of thermal energy from the sun is still low, vacuumtube solar collector will be a well applicable solution to utilize the heat. Using heatpipes as passive heat transfer device, this research was conducted to optimize thethermal performance of solar collector without using extra energy. Characterizationunder the sun, and using halogen lamp with voltage regulator was done in order topredict the heat absorbed by the designed prototype. In this experiment, insulationbox, which made of Styrofoam and wood was made to calculate heat losses.To increase heat absorbed, coating fin is applied at heat pipe. Optimization ofthermal performance of solar collector was done with varied working fluid, wick ofheat pipe, and inclination angle of prototype application, where condensed water,Al2O3-water nanofluid with 5% and 0.3% volumetric concentration were used asvaried working fluid, stainless steen screen mesh with 200, 250, and 300 mesh scalewere used as wick, and inclination angle was varied from 0o – 60o with 15oinclination angle differences.Experimental result and further analysis shows that the best thermal performanceof solar collector prototype by using 0.3% volumetric ratio of Al2O3-water nanofluidas working fluid, stainless steel screen mesh with 300 mesh scale as wick inside heatpipe, and 60o inclination angle for prototype application. The thermal resistance is ashigh as 0.592 oC/W and the system efficiency is as high as 76.53%.] |
T44533-Kristofer Haliansyah.pdf :: Unduh